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module MethodVisibility
#mocking out super calls is tricky, so here is a hack to get around it.
def hide_method(method, replacement = Proc.new(){})
self.send :alias_method, :old_method, method
self.send :define_method, method, replacement
begin
yield
ensure #otherwise other tests get screwed up if an assertion fails inside block
self.send :alias_method, method, :old_method
self.send :remove_method, :old_method
end
end
alias replace_method hide_method
end
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